High voltage electrical transmission line and conduit therefor and method of making same

Claim 1

In combination, an end-to-end operative arrangement of hollow pipes for housing a high voltage transmission line or the like, each pipe comprising an improved insulator tube containing at least one electrically conductive coaxial layer in said insulator tube serving as an electrostatic shield, said insulator tube of adjacent pipes being disposed in telescoped relation with an optimum minimum clearance therebetween to facilitate said telescoping, said clearance being bounded on one side by an inner surface of an outer insulator tube and on the other side by said outer surface of an inner insulator tube, radially oriented electrically conductive elements in said insulator tubes in electrical contact with said electrostatic shields thereof and communicating with said clearance, and an electrically conductive adhesive in said clearance in contact with said bounding surfaces of said insulators and in contact with said radially oriented conductors, whereby said adhesive simultaneously completes said adhesive interconnection of said insulations of said adjacent pipe and also establishes the electrical continuity between said electrostatic shields of adjacent ones of said insulator tubes.